OK people im home and have taken a Picture of the insides
You can see how it works the best thing is how simple it is, the Standed ASA on off pushes the piston onto the bottla valve.
Heres a little video of it turning on and venting , this has both extendes toghter so its really really long LOL
Oh and for the people that asked if it can be used for a HPR extender , YES it can once you remove the Pistons , But i still have no clue why you would want to LOL
But ha it looks alright